1 /***
2 * Redistribution and use of this software and associated documentation
3 * ("Software"), with or without modification, are permitted provided
4 * that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain copyright
7 * statements and notices. Redistributions must also contain a
8 * copy of this document.
9 *
10 * 2. Redistributions in binary form must reproduce the
11 * above copyright notice, this list of conditions and the
12 * following disclaimer in the documentation and/or other
13 * materials provided with the distribution.
14 *
15 * 3. The name "Exolab" must not be used to endorse or promote
16 * products derived from this Software without prior written
17 * permission of Exoffice Technologies. For written permission,
18 * please contact info@exolab.org.
19 *
20 * 4. Products derived from this Software may not be called "Exolab"
21 * nor may "Exolab" appear in their names without prior written
22 * permission of Exoffice Technologies. Exolab is a registered
23 * trademark of Exoffice Technologies.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
28 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39 * OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Copyright 2001,2003 (C) Exoffice Technologies Inc. All Rights Reserved.
42 *
43 * $Id: Descriptor.java,v 1.1 2004/11/26 01:51:15 tanderson Exp $
44 */
45
46 package org.exolab.jms.tools.db;
47
48 import java.lang.reflect.Field;
49 import java.lang.reflect.Modifier;
50 import java.sql.Types;
51 import java.util.HashMap;
52
53
54 /***
55 * This class is a helper class for converting from string values to their
56 * corresponding {@link java.sql.Types}
57 *
58 * @version $Revision: 1.1 $ $Date: 2004/11/26 01:51:15 $
59 * @author <a href="mailto:tima@intalio.com">Tim Anderson</a>
60 */
61 class Descriptor {
62
63 /***
64 * The type identifier, corresponding to one in java.sql.Types
65 */
66 private final int _type;
67
68 /***
69 * The name of the type
70 */
71 private final String _name;
72
73 /***
74 * A map of type identifiers to their names
75 */
76 private static HashMap TYPE_MAP = null;
77
78 /***
79 * A map of names to their corresponding type identifiers
80 */
81 private static HashMap NAME_MAP = null;
82
83 /***
84 * Construct a new descriptor
85 *
86 * @param type the type identifier
87 * @param name the name of the type
88 */
89 private Descriptor(int type, String name) {
90 _type = type;
91 _name = name;
92 }
93
94 /***
95 * Returns the type identifier
96 *
97 * @return the type identifier, corresponding to one in
98 * {@link java.sql.Types}
99 */
100 public int getType() {
101 return _type;
102 }
103
104 /***
105 * Returns the type name
106 */
107 public String getName() {
108 return _name;
109 }
110
111 /***
112 * Returns the descriptor for a given type identifier
113 *
114 * @return the descriptor corresponding to the type identifier, or null
115 * if it doesn't exist
116 */
117 public static Descriptor getDescriptor(int type) {
118 return (Descriptor) TYPE_MAP.get(new Integer(type));
119 }
120
121 /***
122 * Returns the descriptor for a given type name
123 *
124 * @return the descriptor corresponding to the type name, or null
125 * if it doesn't exist
126 */
127 public static Descriptor getDescriptor(String name) {
128 return (Descriptor) NAME_MAP.get(name.toUpperCase());
129 }
130
131 /***
132 * Initialise the maps
133 */
134 static {
135 TYPE_MAP = new HashMap();
136 NAME_MAP = new HashMap();
137 try {
138 Field[] fields = Types.class.getFields();
139 for (int i = 0; i < fields.length; ++i) {
140 Field field = fields[i];
141 if (Modifier.isStatic(field.getModifiers())) {
142 int type = ((Integer) field.get(null)).intValue();
143 String name = field.getName().toUpperCase();
144 Descriptor descriptor = new Descriptor(type, name);
145 TYPE_MAP.put(new Integer(type), descriptor);
146 NAME_MAP.put(name, descriptor);
147 }
148 }
149 } catch (IllegalAccessException exception) {
150 throw new RuntimeException(exception.getMessage());
151 }
152 }
153
154 }